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About Harvard Natural Sciences Lecture Demonstrations
The official YouTube channel of Harvard Natural Science Lecture Demonstrations. Here we have collected as a resource for science instructors short pieces that show some of our demonstration experiments. Most of the entries here link to more detailed descriptions of the demos on our website.
Recent Videos from Harvard Natural Sciences Lecture Demonstrations
Circular Motion vs Mass on Spring
Simultaneous shadow projection of circular motion and an oscillating mass on a spring. We see that the vertical component of the circular motion is identical to that of the vertically oscillating mass. This simple harmonic motion can be mathematically modeled over time with sinusoidal functions.
T… Infrared Camera
We use an infrared camera to look at objects of different temperatures (ice, hot water, candle flame). We then look at objects made of different materials (acrylic, plastic trash bag, aluminum plate) to see which ones are transparent in the infrared vs the visible part of the spectrum. Finally, liq… 5 Minutes of Lava Lamp Convection in 4K
Five minutes of superfluous lava lamp footage. The fixture is about 27 inches tall from top to bottom, with the glass portion extending 14 inches vertically. Inside the glass container is a mix of colored wax and water, which is heated and illuminated from below by a 100W incandescent bulb and a pa…